Use Azure Workload Identity instead of aadpodidentity

[Carl Andersson]

We should look in to replacing aad pod identity with azure workload identity

[Edvin N]

Still waiting for Workload identity to become GA in AKS.

[Philip Laine]

Feature looks to still be in preview.
https://learn.microsoft.com/en-us/azure/aks/workload-identity-overview